CVE-2019-18348 : An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Py

An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue. (This is not exploitable when glibc has CVE-2016-10739 fixed.). This is fixed in: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1.

Published 2019-10-23 17:15:13

Updated 2020-11-16 20:46:29

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2019-18348

Python » Python
Versions from including (>=) 2.0 and up to, including, (<=) 2.7.17
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions
Python » Python
Versions from including (>=) 3.8.0 and before (<) 3.8.3
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions
Python » Python
Versions from including (>=) 3.0 and before (<) 3.5.10
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions
Python » Python
Versions from including (>=) 3.7.0 and before (<) 3.7.8
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions
Python » Python
Versions from including (>=) 3.6.0 and before (<) 3.6.11
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2019-18348

Top countries where our scanners detected CVE-2019-18348

Top open port discovered on systems with this issue 80

IPs affected by CVE-2019-18348 353,993

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2019-18348!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2019-18348

EPSS FAQ

0.53%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 77 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-18348

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:P/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2019-18348

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-18348

https://www.oracle.com/security-alerts/cpuoct2020.html

Oracle Critical Patch Update Advisory - October 2020
Technical Description

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UESGYI5XDAHJBATEZN3MHNDUBDH47AS6/

[SECURITY] Fedora 32 Update: python36-3.6.11-1.fc32 - package-announce - Fedora Mailing-Lists
Mailing List;Technical Description

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/

[SECURITY] Fedora 30 Update: python35-3.5.8-2.fc30 - package-announce - Fedora Mailing-Lists
Mailing List;Technical Description

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/

[SECURITY] Fedora 31 Update: python36-3.6.11-1.fc31 - package-announce - Fedora Mailing-Lists
Mailing List;Technical Description

CVEs referencing this url
https://usn.ubuntu.com/4333-2/

USN-4333-2: Python vulnerabilities | Ubuntu security notices
Technical Description

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00041.html

[security-announce] openSUSE-SU-2020:0696-1: moderate: Security update f
Mailing List;Technical Description

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/

[SECURITY] Fedora 31 Update: python35-3.5.8-2.fc31 - package-announce - Fedora Mailing-Lists
Mailing List;Technical Description

CVEs referencing this url
https://security.netapp.com/advisory/ntap-20191107-0004/

CVE-2019-18348 Python Vulnerability in NetApp Products | NetApp Product Security
Technical Description
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/

[SECURITY] Fedora 29 Update: python35-3.5.8-2.fc29 - package-announce - Fedora Mailing-Lists
Mailing List;Technical Description

CVEs referencing this url
https://usn.ubuntu.com/4333-1/

USN-4333-1: Python vulnerabilities | Ubuntu security notices
Technical Description

CVEs referencing this url
https://bugs.python.org/issue30458#msg347282

Issue 30458: [security][CVE-2019-9740][CVE-2019-9947] HTTP Header Injection (follow-up of CVE-2016-5699) - Python tracker
Issue Tracking;Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1727276

1727276 – (CVE-2019-18348) CVE-2019-18348 python: CRLF injection via the host part of the url passed to urlopen()
Issue Tracking;Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html

[SECURITY] [DLA 2280-1] python3.5 security update
Mailing List;Technical Description

CVEs referencing this url